3
I'm not sure with that particular module. However, I did the exact same thing with the myAlbum module. All I did was install the first instance of it, then copy a new install of the module in a second folder called myalbum2 (obviously in the 'modules' folder). Then go to System Admin\Modules, and you will see another uninstalled copy of the module, so just install it.
Like I say, it worked a treat with myAlbum - cannot say for sure with the module you refer to.
Hope this helps